Finding the Fourth Proportional to 9,989.52, 13,785.27 and 5,513.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,989.52 : 13,785.27 = 5,513.19 : x
2. Step 2: Convert to fraction form
   9,989.52/13,785.27 = 5,513.19/x
3. Step 3: Cross multiply
   9,989.52x = 13,785.27 × 5,513.19
4. Step 4: Simplify right side
   9,989.52x = 76,000,812.71
5. Step 5: Solve for x
   x = 76,000,812.71/9,989.52
6. Step 6: Final answer
   x = 7,608.05